The Fault Tolerance/Distributed C omputing Laboratory (FTDCL) at Auburn University is a facility developed under the sponsorship of the U.S. Army Ballistic Missile Defense Advanced Technology Center (BMDATC) for the purpose of conducting experiments to test and evaluate various candidate fault tolerance techniques for use in multiprocessor computer systems which may be employed for Ballistic Missile Defense (BMD). The FTDCL is unique in that it's structure can be modified as needed to support various hardware-oriented approaches to fault multiprocessor design. This cannot easily be done at other BMDATC testbeds, since the structures of these systems must remain fixed to support a variety of users on a daily basis. The FTDCL facility consists of a tightly-coupled multiprocessor, currently constructed around four single-board computers, four shareable memory modules and an experimental 'shuffle/exchange' interconnection network. The processors in this system work in parallel on various tasks within an overall problem, cooperating by exchanging and sharing data through the common memory. Additional keywords: Distributed data processing; VAX 11/780 computers; Computer aided design.